Ring

The gold and copper alloy rings weigh 14.5 g and have a volume of 1.03 cm3. How much gold and copper does each ring contain?
The metal densities are Au 19.3 g/cm³ and Cu 8.94 kg·dm-3

Correct answer:

a =  9.8583
c =  4.6417

Step-by-step explanation:


a+c = 14.5
a/19.3 + c/8.94 = 1.03

a+c = 14.5
0.051813a+0.111857c = 1.03

Row 2 - 0.051813471502591 · Row 1 → Row 2
a+c = 14.5
0.06c = 0.28


c = 0.27870466/0.06004335 = 4.64172394
a = 14.5-c = 14.5-4.64172394 = 9.85827606

a = 9.858276
c = 4.641724

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